Film · Black and white negative
Ilford Ortho Plus
In productionBW
Orthochromatic film (ISO 80 daylight, 40 tungsten) sensitive to blue and green only, so it can be handled under red safelight and developed by inspection; reds and oranges render dark. 35mm and 120 added in November 2019.
- Box speed
- ISO 80
- Process
- BW
- Formats
- 35mm, 120, 4x5, 8x10
- Grain
- Very fine
- Latitude
- Good
- Reciprocity
- t^1.25
Power-law factor
Characteristics
GrainVery fine, level 1 of 4
ContrastMedium high, level 3 of 4
LatitudeGood, level 3 of 4
Reciprocity failure
Compensation Formula
t' = t1.25
Ilford's published factor P = 1.25: corrected time = metered time ^ 1.25. Ilford says one second or less needs no compensation, and that very long exposures at low light may need some trial and error.
Development times
| Developer | Dilution | ISO | Time | Temp |
|---|---|---|---|---|
| ID-11 | stock | 80 | 8m | 20°C / 68°F |
| ID-11 | 1+1 | 80 | 10m 30s | 20°C / 68°F |
| D-76 | stock | 80 | 8m | 20°C / 68°F |
| D-76 | 1+1 | 80 | 10m 30s | 20°C / 68°F |
| Ilfotec DD-X | 1+4 | 80 | 10m 30s | 20°C / 68°F |
| Microphen | stock | 80 | 9m | 20°C / 68°F |
| Microphen | 1+1 | 80 | 11m 30s | 20°C / 68°F |
| Ilfosol 3 | 1+9 | 80 | 5m | 20°C / 68°F |
| Ilfosol 3 | 1+14 | 80 | 7m | 20°C / 68°F |
| Perceptol | stock | 80 | 13m | 20°C / 68°F |
Showing 10 of 16 entries. Temperatures, mixing and push times for every developer →
Often used for
portraitsfoliagedarkroom handling
Descriptions combine manufacturer specifications with community experience. Subjective assessments reflect common sentiment among photographers and may not match your results.